Cutter head.



COLLINS ORTvON, OF SAN FRANCISCO,y CALIFORNIA.

CUTTER-HEAD.

Specification ofL Letters Patent. y Patented Sept, 29, 1914,

Application filed February 11, 1914.V Serial No. 818,052.

To all whom it may concern Be it known that I, COLLINS K. OnToN, acitizen of the United States, residing in the city and county of SanFrancisco and State of California, have invented new and usefulImprovements in Cutter Heads, of which the following is a specification.

My invention relates to improvements which are especially designed forrotary cutter heads, such as are used in planei's and like machines. v

rlhe object of the present invention'is to provide a simpler and moreeffective means for securing the cutter blades in place in the cutterhead or body.

It consists inran improved method for locking the cutter blade vinposition, in operating the .locking mechanism, and in details ofconstruction which will be more fully explained by reference to thelaccompanying drawings, in which- Figure l is a transverse sectional viewofl a cutter head taken' through thefplane of the securing device.l Fig. 2 is a similar view showing a slight modification. F ig. 3 is an endview of a locking wedge. Fig; 4 is l a side elevation of same.

lso

For the purpose of securing'the cutters of planer and like heads inposition, various devices have been employed to prevent the cutter frommoving from its position when once established. In my device the planerhead or cylinder A has formedin it a suificient number of channels 2made longitudinally along the periphery of the head and parallel wit"each other. These channels are formed with a deeper portion 2a, adaptedto receive the cutter blade 4c; the yback wall of each of said channelsbeing tangential'to a circle made interior to the outer periphery of thecutter head, and these backs serve as a support for the back of thecutter knife. The opposite side or front of the channel 2 issubstantially radial with the axis of the cutter head, and the back andfront sides thus converge from the interior outwardly.

In order to lock the knife in position, I have shown a block 5 having asubstantially trapezoidal shape; that is, the back of the block is aplane which abuts against the front of the cutter blade and the oppositeside of the block is a plane which coincides with and ts the front`plane of the channel 2. The top of this block, corresponding with theperiphery of the cutter head, is made concave, as shown at 6, so as toform an effective gullet for any the operation of the cutter, thissurface being 'unperforated The inner face of the blockmay be made twoways. kAs shown in F ig. 1 it hasa screw recess stopping short of theupper surface. Coincident with and fitting this recess is a threadedscrew 8, having a gear 9 fixed to the inner end. This gear is containedin radial with that of the screw S, and itsperiphery may projectslightly beyond thev face into an undercut space below the bottom ofthefront face of the channel 2, as shown.

chips detached by i Athreaded recess l bored into it radially, said thebottomnof the channel`2, havingr its axis A hole l0 is drilled into theperiphery of the cutter head in such a position that it intersects thatpart of the channel in'which the gear lies. A key ll has pinion'teethformed upon its lower end, and this key, t-

ting the opening l0, may be introduced so that its teeth will engagethose of the gear, thus'enablingk the gear to beturned withwhateverpower may be necessary.

The trapezoidal block and-fthe blade ybeing introduced into the channelin proper position, with the inclined rear of the block pressing againstthe front of the blade, and

the blade itself contacting with the back ofy the channel of the cutterhead, the key 11 may be introduced to engage with the gear wheelcarrying the screw, the latter having been previously introduced `intothe space beneath the block. By turning the key, the screw will berevolved and the threads of the screw will advance the block in itsangular channel until its face is lockedl iirmly against the blade ofthe cutter to render thek In Iiig. 2 the arrangement of all of the vparts is similar, except that the block has the cone-shaped socket init. The screw threaded chamber is made in line with this bearing, andthe screw, which enters the screw threaded socket, extends inwardly intothe body of the cutter head. The gear andA the pinion key areconstructed similar to that previously described, theonly diiferor aplurality of such blocks may be iXed at intervals from one end to the'other of the cutter head by being locked independently.`

l lI/Yhile the cutter blades are shown as being positioned tangentialtoa circle made interior to the outer periphery of the cutter head, itis obvious that they may be posi-` tioned radially or angularly. Theposition of the cutters may in other words be changed. to suitconditionsandthe material treated. I also wish it understood that various otherchanges in form, proportions and minor details of construction may beresorted to j within the scope of the appended claims and v` that Idonot wish to limit myself to the specific design and construction hereshown.-

' Having thus described my invention, what I claim and desire to secureby Letters Patent is-. v

' 1. In combination with a cutter head hav ing 'a channel, a block inthe channel, one of `said partshaving an annular recess with a centralthreaded hole leading therein, the

other part having a socket, and the head having a holey which intersectsthe'recess, i screw threaded intosaid threaded hole, a gear between theblock base and the channel tatably received insaid annular recess, saidgear having a journal which projects into the socket and having a partthereof projec'ting into said hole which intersects the recess, and akey having ypinion teeth inl sertible in' said lastnamed hole and havingits teeth engageable with the teeth of said Oear.

b- 2. In combinationwith a cutter head having a channel in itsperiphery, and ablock in the channel, a gear disposed between the blockbase and the bottom of the'channel and having a journal which bears onone of bottom affixed to said screw and being rosaid elements, ascrewconnected to the gear and rotatably and positively vengaged with,

the other element, said head having a hole in its periphery whichintersects "a portion of the gear teeth, and a 'key insertible in saidhole and having "teeth forengagement with Y the gear teeth.

In testimony whereof I havehereunto set l my han'duzin the presence oftwo subscribing witnesses.

Witnesses:

JOHN H. I-IERRING, D. B. RICHARDS.

@coLLiNs irvonroiv.

Copiesvof this patent `may be obtained for ve cents each, by addressingthe Gommissionerfof Patents, 5,

i Washington, D. C.

